how to use unknown size of array at compile time for further processing

[thorstein]

> Replace
> arrayT ~= rowT;
> with
> arrayT ~= rowT.dup;
>
> Also, you may want to look into ndslice package [1].
> [1] https://github.com/libmir/mir-algorithm
>
> Best regards,
> Ilya Yaroshenko

Works! Thanks Ilya. I'll take a look on the difference. Also soon 
will get bit familiar with the mir-algorithm...

Best, Torsten